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Principal Engineer Underground Mining

Rio Tinto
life insurance, paid holidays, 401(k), remote work
United States, Arizona, Phoenix
Sep 03, 2025

Principal Mining Engineer - Underground

  • Join a global organization at the forefront of mining innovation
  • Excellent work environment where people are valued and respected
  • Join an encouraging leadership group, committed to your growth and development
  • Permanent role based in Phoenix with periodic international travel

About the role

Finding better ways to provide the materials the world needs.

We are looking for aPrincipal Mining Engineer - Undergroundto provide technical expertise to the Rio Tinto Copper assets and studies including the Resolution Project, Kennecott Underground and Oyu Tolgoi Mine. This is a pivotal role in helping Rio Tinto's realize its vision to become the World's Best Operator. The role will see you representing the Central Technical function to operational, study and project teams.

We are an open, connected global team that includes some of the industry's best and brightest minds. We offer competitive, performance-focused remuneration and a wide range of benefits to reward your contribution. With a global reach, the opportunities to develop and grow your career are broad and exciting.

Reporting to the Chief Underground Mining Engineer and working within a dynamic and innovative environment, this role will:

  • Provide technical leadership and direction to underground mining studies, ensuring lessons learned and best practices are incorporated appropriate to the individual orebody conditions for optimal business performance.
  • Provide technical support to our underground mines, particularly the Resolution project.
  • Undertake performance monitoring and evaluation of underground projects and operations, recommend improvement measures and implementation as required.
  • Support major hazard management activities associated with studies, projects and operations.
  • Develop, document, and continually improve our operations, including lessons learned, best practice standards guidelines, processes and procedures.
  • Develop underground mining (stoping and cave mining) expertise and capability across the group, including effective collaboration between assets in maximizing the collective capability in caving and underground mining.
  • Improve technical systems and processes within the business, including data quality andutilization
  • Provide strategic advice to senior leaders as well as internal and external stakeholder groups as appropriate.

What you will bring

  • A commitment to the safety of yourself and your team
  • Recognized bachelor's degree in mine engineering
  • Extensive underground technical experience in underground mining studies, projects and operations
  • Operational experience in cave mining, including mine design, scheduling, draw control and hazard management
  • Deswik and PCBC software experience
  • Excellent stakeholder engagement capability
  • Demonstrated commercial insight, strategic thinking and business acumen.
  • Knowledge of risk assessment and management practices
  • Sound leadership, coaching and mentoring capability

What We Offer

  • Inclusive Environment: A safety-focused and inclusive working environment.
  • Competitive Salary: Advantageous salary package with annual incentive awards.
  • Health Programs: Comprehensive medical, dental, vision, and life insurance coverage.
  • Retirement Savings: Up to 6% company contribution and generous 401(k) matching.
  • Employee Share Program: Opportunity to purchase Rio Tinto shares.
  • Leave Policies: PTO, paid holidays, bereavement leave, and caregiver leave.
  • Discount Programs: Access to wellness and lifestyle discount programs.
  • Support Programs: Employee Assistance Program (EAP) for personal and family support.
  • Career Development: Opportunities for learning, growth, and career advancement

Where you will be working

The Rio Tinto Copper group is a global organization with operations and projects in the U.S. (Kennecott Utah Copper, "RTKC", and Resolution Copper Project), Mongolia (Oyu Tolgoi), Simandou (Guinea) and Western Australia (Winu Cu-Au project). The portfolio also includes interests in a non-managed joint venture in Chile, in addition to exploration & evaluation interests and other minor investments.

The role is based in Phoenix to primarily support Resolution and our North American assets. We offer a flexible working arrangement with a balance of office-based and work from home. There is an ongoing requirement for additional hours outside the standard working day to support colleagues in alternative time zones. You will be required to travel internationally on a periodic basis (conditions permitting).

About Rio Tinto

Rio Tinto is a leading global mining and materials company. We operate in 35 countries where we produce iron ore, copper, aluminium, critical minerals, and other materials needed for the global energy transition and for people, communities, and nations to thrive.

We have been mining for 150 years and operate with knowledge built up across generations and continents. Our purpose is finding better ways to provide the materials the world needs - striving for innovation and continuous improvement to produce materials with low emissions and to the right environmental, social and governance standards. But we can't do it on our own, so we're focused on creating partnerships to solve problems, create win-win situations and meet opportunities.

Every Voice Matters

Rio Tinto is committed to equal employment opportunity. All qualified applicants will be considered without regard to race, color, sex, age, religion, national origin, disability, or any other characteristic protected by federal, state, or local law.

We are committed to an inclusive environment where people feel safe, respected and valued. We want our people to feel that all voices are heard and that a variety of perspectives are not only welcome but are essential to our success. We treat all our people fairly and with dignity.

Rio Tinto participates in E- Verify to confirm work authorization. Please visit http://www.ucis.gov/ for more information.

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